## Algebraic Fractions

The same rules apply for algebraic fractions as for normal fractions

When adding or subtracting, make a common denominator.

When multiplying fractions, cross cancel first if possible. Multiply the denominators together to make a new denominator. Multiply the numerators together to make a new numerator. Cancel if possible.

When dividing fractions, invert the dividing fraction and multiply.

Example: Add and simplify

Notice first thatfactorises intoThe question becomes

Example: Add and simplify if possible:

No further simplification is possible.

Example: Multiplyby

factorises:

Hence

since theandterms cross cancel.

Example: Divideby

factorises:Hence

Since theterms cross cancel.